From 6997865c57871afae6a25f784641ed410360d89f Mon Sep 17 00:00:00 2001 From: Oleg Gerasimov Date: Sun, 14 Aug 2016 12:46:32 +0300 Subject: Added ST7735 driver --- drivers/gdisp/ST7735/driver.mk | 2 + drivers/gdisp/ST7735/gdisp_lld_ST7735.c | 381 ++++++++++++++++++++++++++++++++ drivers/gdisp/ST7735/gdisp_lld_config.h | 23 ++ drivers/gdisp/ST7735/st7735.h | 51 +++++ 4 files changed, 457 insertions(+) create mode 100644 drivers/gdisp/ST7735/driver.mk create mode 100644 drivers/gdisp/ST7735/gdisp_lld_ST7735.c create mode 100644 drivers/gdisp/ST7735/gdisp_lld_config.h create mode 100644 drivers/gdisp/ST7735/st7735.h diff --git a/drivers/gdisp/ST7735/driver.mk b/drivers/gdisp/ST7735/driver.mk new file mode 100644 index 00000000..e7caf2cb --- /dev/null +++ b/drivers/gdisp/ST7735/driver.mk @@ -0,0 +1,2 @@ +GFXINC += $(GFXLIB)/drivers/gdisp/ST7735 +GFXSRC += $(GFXLIB)/drivers/gdisp/ST7735/gdisp_lld_ST7735.c diff --git a/drivers/gdisp/ST7735/gdisp_lld_ST7735.c b/drivers/gdisp/ST7735/gdisp_lld_ST7735.c new file mode 100644 index 00000000..67f938b9 --- /dev/null +++ b/drivers/gdisp/ST7735/gdisp_lld_ST7735.c @@ -0,0 +1,381 @@ +/* + * Created by Oleg Gerasimov + * 14.08.2016 + */ + +#include "gfx.h" + +#if GFX_USE_GDISP + +#if defined(GDISP_SCREEN_HEIGHT) + #warning "GDISP: This low level driver does not support setting a screen size. It is being ignored." + #undef GISP_SCREEN_HEIGHT +#endif +#if defined(GDISP_SCREEN_WIDTH) + #warning "GDISP: This low level driver does not support setting a screen size. It is being ignored." + #undef GDISP_SCREEN_WIDTH +#endif + +#define GDISP_DRIVER_VMT GDISPVMT_ST7735 +#include "gdisp_lld_config.h" +#include "src/gdisp/gdisp_driver.h" + +#include "board_ST7735.h" + +/*===========================================================================*/ +/* Driver local definitions. */ +/*===========================================================================*/ + +#ifndef GDISP_SCREEN_HEIGHT + #define GDISP_SCREEN_HEIGHT 160 +#endif +#ifndef GDISP_SCREEN_WIDTH + #define GDISP_SCREEN_WIDTH 128 +#endif +#ifndef GDISP_INITIAL_CONTRAST + #define GDISP_INITIAL_CONTRAST 100 +#endif +#ifndef GDISP_INITIAL_BACKLIGHT + #define GDISP_INITIAL_BACKLIGHT 100 +#endif + +// Define one of supported type, if not defined yet +#if !defined(ST7735_TYPE_R) && !defined(ST7735_TYPE_B) + // It seems all modern boards is 7735R + #define ST7735_TYPE_R TRUE +#endif + +// Define one of supported color packing, if not defined yet +#if !defined(ST7735_COLOR_RGB) && !defined(ST7735_COLOR_BRG) + // It seems all modern boards is RGB + #define ST7735_COLOR_RGB TRUE +#endif + + +// Strange boars with shifted coords +#if !defined (ST7735_SHIFTED_COORDS) + #define ST7735_SHIFTED_COORDS FALSE +#endif + + +#if ST7735_COLOR_RGB + #define ST7735_MADCTRL_COLOR 0x00 +#else + #define ST7735_MADCTRL_COLOR 0x08 +#endif + +#if ST7735_SHIFTED_COORDS + #define ST7735_COL_SHIFT 2 + #define ST7735_ROW_SHIFT 1 +#else + #define ST7735_COL_SHIFT 0 + #define ST7735_ROW_SHIFT 0 +#endif + + +#include "drivers/gdisp/ST7735/ST7735.h" + +// Some common routines and macros +#define dummy_read(g) { volatile uint16_t dummy; dummy = read_data(g); (void) dummy; } +#define write_reg(g, reg, data) { write_cmd(g, reg); write_data(g, data); } + +// Serial write data for fast fill. +#ifndef write_data_repeat +#define write_data_repeat(g, data, count) { int i; for (i = 0; i < count; ++i) write_data (g, data) } +#endif + +// Commands list copied from https://github.com/adafruit/Adafruit-ST7735-Library +#define DELAY 0x80 + +#if ST7735_TYPE_B +static const unsigned char + init_cmds[] = { // Initialization commands for 7735B screens + 16, // 16 commands in list: + ST7735_SWRESET, DELAY, // 1: Software reset, no args, w/delay + 50, // 50 ms delay + ST7735_SLPOUT , DELAY, // 2: Out of sleep mode, no args, w/delay + 255, // 255 = 500 ms delay + ST7735_COLMOD , 1+DELAY, // 3: Set color mode, 1 arg + delay: + 0x05, // 16-bit color + 10, // 10 ms delay + ST7735_FRMCTR1, 3+DELAY, // 4: Frame rate control, 3 args + delay: + 0x00, // fastest refresh + 0x06, // 6 lines front porch + 0x03, // 3 lines back porch + 10, // 10 ms delay + ST7735_MADCTL , 1 , // 5: Memory access ctrl (directions), 1 arg: + ST7735_MADCTRL_COLOR, // Row addr/col addr, bottom to top refresh + ST7735_DISSET5, 2 , // 6: Display settings #5, 2 args, no delay: + 0x15, // 1 clk cycle nonoverlap, 2 cycle gate + // rise, 3 cycle osc equalize + 0x02, // Fix on VTL + ST7735_INVCTR , 1 , // 7: Display inversion control, 1 arg: + 0x0, // Line inversion + ST7735_PWCTR1 , 2+DELAY, // 8: Power control, 2 args + delay: + 0x02, // GVDD = 4.7V + 0x70, // 1.0uA + 10, // 10 ms delay + ST7735_PWCTR2 , 1 , // 9: Power control, 1 arg, no delay: + 0x05, // VGH = 14.7V, VGL = -7.35V + ST7735_PWCTR3 , 2 , // 10: Power control, 2 args, no delay: + 0x01, // Opamp current small + 0x02, // Boost frequency + ST7735_VMCTR1 , 2+DELAY, // 11: Power control, 2 args + delay: + 0x3C, // VCOMH = 4V + 0x38, // VCOML = -1.1V + 10, // 10 ms delay + ST7735_PWCTR6 , 2 , // 12: Power control, 2 args, no delay: + 0x11, 0x15, + ST7735_GMCTRP1,16 , // 13: Magical unicorn dust, 16 args, no delay: + 0x09, 0x16, 0x09, 0x20, // (seriously though, not sure what + 0x21, 0x1B, 0x13, 0x19, // these config values represent) + 0x17, 0x15, 0x1E, 0x2B, + 0x04, 0x05, 0x02, 0x0E, + ST7735_GMCTRN1,16+DELAY, // 14: Sparkles and rainbows, 16 args + delay: + 0x0B, 0x14, 0x08, 0x1E, // (ditto) + 0x22, 0x1D, 0x18, 0x1E, + 0x1B, 0x1A, 0x24, 0x2B, + 0x06, 0x06, 0x02, 0x0F, + 10, // 10 ms delay + ST7735_NORON , DELAY, // 17: Normal display on, no args, w/delay + 10, // 10 ms delay + ST7735_DISPON , DELAY, // 18: Main screen turn on, no args, w/delay + 255 }; // 255 = 500 ms delay +#elif ST7735_TYPE_R +static const unsigned char + init_cmds[] = { // Init for 7735R, part 1 (red or green tab) + 19, // 19 commands in list: + ST7735_SWRESET, DELAY, // 1: Software reset, 0 args, w/delay + 150, // 150 ms delay + ST7735_SLPOUT , DELAY, // 2: Out of sleep mode, 0 args, w/delay + 255, // 500 ms delay + ST7735_FRMCTR1, 3 , // 3: Frame rate ctrl - normal mode, 3 args: + 0x01, 0x2C, 0x2D, // Rate = fosc/(1x2+40) * (LINE+2C+2D) + ST7735_FRMCTR2, 3 , // 4: Frame rate control - idle mode, 3 args: + 0x01, 0x2C, 0x2D, // Rate = fosc/(1x2+40) * (LINE+2C+2D) + ST7735_FRMCTR3, 6 , // 5: Frame rate ctrl - partial mode, 6 args: + 0x01, 0x2C, 0x2D, // Dot inversion mode + 0x01, 0x2C, 0x2D, // Line inversion mode + ST7735_INVCTR , 1 , // 6: Display inversion ctrl, 1 arg, no delay: + 0x07, // No inversion + ST7735_PWCTR1 , 3 , // 7: Power control, 3 args, no delay: + 0xA2, + 0x02, // -4.6V + 0x84, // AUTO mode + ST7735_PWCTR2 , 1 , // 8: Power control, 1 arg, no delay: + 0xC5, // VGH25 = 2.4C VGSEL = -10 VGH = 3 * AVDD + ST7735_PWCTR3 , 2 , // 9: Power control, 2 args, no delay: + 0x0A, // Opamp current small + 0x00, // Boost frequency + ST7735_PWCTR4 , 2 , // 10: Power control, 2 args, no delay: + 0x8A, // BCLK/2, Opamp current small & Medium low + 0x2A, + ST7735_PWCTR5 , 2 , // 11: Power control, 2 args, no delay: + 0x8A, 0xEE, + ST7735_VMCTR1 , 1 , // 12: Power control, 1 arg, no delay: + 0x0E, + ST7735_INVOFF , 0 , // 13: Don't invert display, no args, no delay + ST7735_MADCTL , 1 , // 14: Memory access control (directions), 1 arg: + 0xC0|ST7735_MADCTRL_COLOR, // row addr/col addr, bottom to top refresh + ST7735_COLMOD , 1 , // 15: set color mode, 1 arg, no delay: + 0x05, // 16-bit color + ST7735_GMCTRP1, 16 , // 1: Magical unicorn dust, 16 args, no delay: + 0x02, 0x1c, 0x07, 0x12, + 0x37, 0x32, 0x29, 0x2d, + 0x29, 0x25, 0x2B, 0x39, + 0x00, 0x01, 0x03, 0x10, + ST7735_GMCTRN1, 16 , // 2: Sparkles and rainbows, 16 args, no delay: + 0x03, 0x1d, 0x07, 0x06, + 0x2E, 0x2C, 0x29, 0x2D, + 0x2E, 0x2E, 0x37, 0x3F, + 0x00, 0x00, 0x02, 0x10, + ST7735_NORON , DELAY, // 3: Normal display on, no args, w/delay + 10, // 10 ms delay + ST7735_DISPON , DELAY, // 4: Main screen turn on, no args w/delay + 100 + }; // 100 ms delay +#endif + + +static void execute_cmds (const uint8_t *addr) { + + unsigned int cmds = *addr++; + while (cmds--) { + write_cmd (g, *addr++); + unsigned int args = *addr++; + unsigned int ms = args & DELAY; + args &= ~DELAY; + while(args--) + write_data_byte (g,*addr++); + if (ms) { + ms = *addr++; + gfxSleepMilliseconds(ms==255?500:ms); + } + } +} + + +LLDSPEC bool_t gdisp_lld_init(GDisplay *g) { + // No private area for this controller + g->priv = 0; + + // Initialise the board interface + init_board(g); + + // Hardware reset + setpin_reset(g, TRUE); + gfxSleepMilliseconds(20); + setpin_reset(g, FALSE); + gfxSleepMilliseconds(20); + + // Get the bus for the following initialisation commands + acquire_bus(g); + execute_cmds (init_cmds); + release_bus(g); + + // Finish Init + post_init_board(g); + + /* Turn on the back-light */ + set_backlight(g, GDISP_INITIAL_BACKLIGHT); + + /* Initialise the GDISP structure */ + g->g.Width = GDISP_SCREEN_WIDTH; + g->g.Height = GDISP_SCREEN_HEIGHT; + g->g.Orientation = GDISP_ROTATE_0; + g->g.Powermode = powerOn; + g->g.Backlight = GDISP_INITIAL_BACKLIGHT; + g->g.Contrast = GDISP_INITIAL_CONTRAST; + return TRUE; +} + +static void set_viewport(GDisplay *g) { + write_cmd (g, ST7735_CASET); + write_data (g, g->p.x+ST7735_COL_SHIFT); + write_data (g, g->p.x+g->p.cx-1+ST7735_COL_SHIFT); + write_cmd (g, ST7735_RASET); + write_data (g, g->p.y+ST7735_ROW_SHIFT); + write_data (g, g->p.y+g->p.cy-1+ST7735_ROW_SHIFT); + write_cmd (g, ST7735_RAMWR); +} + +#if GDISP_HARDWARE_STREAM_WRITE +LLDSPEC void gdisp_lld_write_start(GDisplay *g) { + acquire_bus(g); + set_viewport(g); +} + +LLDSPEC void gdisp_lld_write_color(GDisplay *g) { + LLDCOLOR_TYPE c; + c = gdispColor2Native(g->p.color); + write_data(g, c ); +} + +LLDSPEC void gdisp_lld_write_stop(GDisplay *g) { + release_bus(g); +} + +#endif + +LLDSPEC void gdisp_lld_draw_pixel(GDisplay *g) { + set_viewport(g); + gdisp_lld_write_color (g); +} + +#if GDISP_HARDWARE_FILLS +LLDSPEC void gdisp_lld_fill_area(GDisplay *g) { + LLDCOLOR_TYPE c = gdispColor2Native(g->p.color); + + acquire_bus(g); + set_viewport (g); + write_data_repeat (g,c,g->p.cx*g->p.cy); + release_bus(g); +} +#endif // GDISP_HARDWARE_FILLS + +#if GDISP_NEED_CONTROL && GDISP_HARDWARE_CONTROL +LLDSPEC void gdisp_lld_control(GDisplay *g) { + switch(g->p.x) { + case GDISP_CONTROL_POWER: + if (g->g.Powermode == (powermode_t)g->p.ptr) + return; + switch((powermode_t)g->p.ptr) { + case powerOff: + acquire_bus(g); + // not implemented + release_bus(); + set_backlight(g, 0); + break; + case powerSleep: + case powerDeepSleep: + // not implemented + acquire_bus(g); + release_bus(g); + set_backlight(g, 0); + break; + case powerOn: + acquire_bus(g); + // not implemented + release_bus(g); + set_backlight(g, g->g.Backlight); + break; + default: + return; + } + g->g.Powermode = (powermode_t)g->p.ptr; + return; + + case GDISP_CONTROL_ORIENTATION: + if (g->g.Orientation == (orientation_t)g->p.ptr) + return; + switch((orientation_t)g->p.ptr) { + case GDISP_ROTATE_0: + acquire_bus(g); + write_cmd(g, ST7735_MADCTL); + write_data_byte(g, 0xC0|ST7735_MADCTRL_COLOR); + g->g.Height = GDISP_SCREEN_HEIGHT; + g->g.Width = GDISP_SCREEN_WIDTH; + release_bus(g); + break; + case GDISP_ROTATE_90: + acquire_bus(g); + write_cmd(g, ST7735_MADCTL); + write_data_byte(g, 0xA0|ST7735_MADCTRL_COLOR); + g->g.Height = GDISP_SCREEN_WIDTH; + g->g.Width = GDISP_SCREEN_HEIGHT; + release_bus(g); + break; + case GDISP_ROTATE_180: + acquire_bus(g); + write_cmd(g, ST7735_MADCTL); + write_data_byte(g, 0x00|ST7735_MADCTRL_COLOR); + g->g.Height = GDISP_SCREEN_HEIGHT; + g->g.Width = GDISP_SCREEN_WIDTH; + release_bus(g); + break; + case GDISP_ROTATE_270: + acquire_bus(g); + write_cmd(g, ST7735_MADCTL); + write_data_byte(g, 0x60|ST7735_MADCTRL_COLOR); + g->g.Height = GDISP_SCREEN_WIDTH; + g->g.Width = GDISP_SCREEN_HEIGHT; + release_bus(g); + break; + default: + return; + } + g->g.Orientation = (orientation_t)g->p.ptr; + return; + case GDISP_CONTROL_BACKLIGHT: + if ((unsigned)g->p.ptr > 100) + g->p.ptr = (void *)100; + set_backlight(g, (unsigned)g->p.ptr); + g->g.Backlight = (unsigned)g->p.ptr; + return; + default: + return; + } +} +#endif + +#endif /* GFX_USE_GDISP */ diff --git a/drivers/gdisp/ST7735/gdisp_lld_config.h b/drivers/gdisp/ST7735/gdisp_lld_config.h new file mode 100644 index 00000000..5c76924e --- /dev/null +++ b/drivers/gdisp/ST7735/gdisp_lld_config.h @@ -0,0 +1,23 @@ +/* + * Created by Oleg Gerasimov + * 10.08.2016 +*/ + +#ifndef _GDISP_LLD_CONFIG_H +#define _GDISP_LLD_CONFIG_H + +#if GFX_USE_GDISP + +/*===========================================================================*/ +/* Driver hardware support. */ +/*===========================================================================*/ + +#define GDISP_HARDWARE_STREAM_WRITE TRUE +#define GDISP_HARDWARE_CONTROL TRUE +#define GDISP_HARDWARE_FILLS TRUE + +#define GDISP_LLD_PIXELFORMAT GDISP_PIXELFORMAT_RGB565 + +#endif /* GFX_USE_GDISP */ + +#endif /* _GDISP_LLD_CONFIG_H */ diff --git a/drivers/gdisp/ST7735/st7735.h b/drivers/gdisp/ST7735/st7735.h new file mode 100644 index 00000000..49967f9f --- /dev/null +++ b/drivers/gdisp/ST7735/st7735.h @@ -0,0 +1,51 @@ +#ifndef _ST7735_H_ +#define _ST7735_H_ + +#define ST7735_NOP 0x00 +#define ST7735_SWRESET 0x01 +#define ST7735_RDDID 0x04 +#define ST7735_RDDST 0x09 + +#define ST7735_SLPIN 0x10 +#define ST7735_SLPOUT 0x11 +#define ST7735_PTLON 0x12 +#define ST7735_NORON 0x13 + +#define ST7735_INVOFF 0x20 +#define ST7735_INVON 0x21 +#define ST7735_DISPOFF 0x28 +#define ST7735_DISPON 0x29 +#define ST7735_CASET 0x2A +#define ST7735_RASET 0x2B +#define ST7735_RAMWR 0x2C +#define ST7735_RAMRD 0x2E + +#define ST7735_PTLAR 0x30 +#define ST7735_COLMOD 0x3A +#define ST7735_MADCTL 0x36 + +#define ST7735_FRMCTR1 0xB1 +#define ST7735_FRMCTR2 0xB2 +#define ST7735_FRMCTR3 0xB3 +#define ST7735_INVCTR 0xB4 +#define ST7735_DISSET5 0xB6 + +#define ST7735_PWCTR1 0xC0 +#define ST7735_PWCTR2 0xC1 +#define ST7735_PWCTR3 0xC2 +#define ST7735_PWCTR4 0xC3 +#define ST7735_PWCTR5 0xC4 +#define ST7735_VMCTR1 0xC5 + +#define ST7735_RDID1 0xDA +#define ST7735_RDID2 0xDB +#define ST7735_RDID3 0xDC +#define ST7735_RDID4 0xDD + +#define ST7735_PWCTR6 0xFC + +#define ST7735_GMCTRP1 0xE0 +#define ST7735_GMCTRN1 0xE1 + +#endif + -- cgit v1.2.3 From 2d42bd44a2c0cae376c72de98609b1ccee4a4804 Mon Sep 17 00:00:00 2001 From: Oleg Gerasimov Date: Sun, 14 Aug 2016 21:32:33 +0300 Subject: Increased st7735 refresh rate - no more flicker --- drivers/gdisp/ST7735/gdisp_lld_ST7735.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/gdisp/ST7735/gdisp_lld_ST7735.c b/drivers/gdisp/ST7735/gdisp_lld_ST7735.c index 67f938b9..37779093 100644 --- a/drivers/gdisp/ST7735/gdisp_lld_ST7735.c +++ b/drivers/gdisp/ST7735/gdisp_lld_ST7735.c @@ -150,7 +150,7 @@ static const unsigned char ST7735_SLPOUT , DELAY, // 2: Out of sleep mode, 0 args, w/delay 255, // 500 ms delay ST7735_FRMCTR1, 3 , // 3: Frame rate ctrl - normal mode, 3 args: - 0x01, 0x2C, 0x2D, // Rate = fosc/(1x2+40) * (LINE+2C+2D) + 0x00, 0x0, 0x0, // Rate = fosc/(0+40) * (LINE+0+0) ST7735_FRMCTR2, 3 , // 4: Frame rate control - idle mode, 3 args: 0x01, 0x2C, 0x2D, // Rate = fosc/(1x2+40) * (LINE+2C+2D) ST7735_FRMCTR3, 6 , // 5: Frame rate ctrl - partial mode, 6 args: @@ -161,7 +161,7 @@ static const unsigned char ST7735_PWCTR1 , 3 , // 7: Power control, 3 args, no delay: 0xA2, 0x02, // -4.6V - 0x84, // AUTO mode + 0x44, // mode 3 ST7735_PWCTR2 , 1 , // 8: Power control, 1 arg, no delay: 0xC5, // VGH25 = 2.4C VGSEL = -10 VGH = 3 * AVDD ST7735_PWCTR3 , 2 , // 9: Power control, 2 args, no delay: -- cgit v1.2.3